I have been IFing via the leangains approach for the past few weeks while doing strength 3-4x and metcons 4-5x a week and have had improvements in body composition but a slight decrease in performance particularly in the strength department. I realize Martins approach is geared more towards improving body composition. If my primary goal is just increased performance should I just ditch the IF altogether? I feel great fasting and usually do my workouts fasted after taking 10g BCAAs. Is this perhaps not enough fuel for strength + metcons? Thanks.

Derek, my workout schedule is basically Crossfit Football but sometimes I have short workouts in the early morning (fairly low to moderate intensity army pt). Recently ive been taking ~10g BCAAs and doing my workouts around 12-1pm then breaking the fast immediately afterward and eating until 8-9pm. Im almost positive im taking in 2500+ calories a day (i only weigh 158) which should be enough to maintain my weight but i guess i should try counting my calories for a few days to make sure.

When was the last time you backed off from the CF Football? Or actually, the last time you took a deload from everything? you don't have much choice over the Army PT, but everything else you do.

I'd do a couple of things. Eat more would be one. The other would be to look and see the last time you either took a weak at ~1/2 intensity for CF FB, or a week off altogether. If it's been any longer than 4 weeks, I would take a down week on the lifting, and skip the metabolic stuff completely.

158 lbs... and what height?

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And if you don't think kettleball squat cleans are difficult, I say, step up to the med-ball

Derek has nailed it in my opinion. Rest is needed. I have been experminenting with IF ala leangains for a few weeks, performance has increased and weight has gone down. I think the difference here is I take a deload week every month and am careful not to overdose on metcon.